Ribbon mechanism for type-writing machines.



O. PETERMANN.

RIBBON MECHANISM FOR TYPE WRITING MACHINES.

AYPLIOATION FILED 0012 25. 19101 RENEWED 0012a, 1914.

1,1 21,038. Patented Dec. 15, 1914.

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' WITNESSES INVENTOR 5 3% 0 peter ATTORNEYS I o. PETERMANN. RIBBON MECHANISM FOR TYPE WRITING MACHINES. APPLICATION FILED OCT. 25. 1910. RENEWED 001. B, 1914.

1,121,038, Patented Dec. 15,1914.

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OTTO PETERIIANN, OF GROTON, NEW YORK, ASSIGNOR TO CORONA TYPEWRI'IER COMPANY, INCORPORATED, A CORPORATION OF NEW YORK. i

i RIBBON MECHANISM FOR TYPE-WRITING Specification of Letters Patent.

Patented Dec. 15, 1914.

Application fled October 85, 1910, Serial No. 589,052. -Renewed October 8, 1914. Serial No. 865,775.

To all whom it may concern Be'it known that I, O'r'ro PETERMANN, a citizen of the Republic of Switzerland, and a resident of Groton, county of Tompkins, and State of New York, have invented certain new and useful Im rovements in Ribbon Mechanism for ype-Writing Machines, of which the following is a full, clear, and exact description.

This invention relates more particularly to ribbon spool-operating meansof what are known as front-strike typewriting machines.

In certain of my pending applications, the ribbon spools have been mounted upon a foldable or shiftable portion of the frame which may be moved into compact relation to another part of the machine with the platen or platen carriage, and the ribbon spools have been so mounted upon the frame that to wind the ribbon from one spool on to another it required the ti hten ing of one thumb nut and the releasing of another to cause one spool to be positively rotated and the other to remain free to rotate on its support. In this case, a part of the ribbon mechanism was operated continuously and the movement of the ribbon in one direction or the other depended upon the tightening of one thumb nut and the loosening of the other, but very often the operator would either permit both thumb screws to be loose so that the ribbon did not move and which would result in bad printing and possibly make a hole in the ribbon, or the operator would tighten one spool and forget to release the other, thus causing a strain on the ribbon mechanism and very often destroying the alinement as well as injuriously affecting other parts of the construction.

The primary object of the invention is to overcome the objections referred to and to provide means whereby it will not be neces sary to tighten the parts so that one spool will be positively operated and the other rotated freely on its support, and to provide means whereby the ribbon spool mechanism may be easily and readily disengaged from one spool and caused to engage the other spool so that only one s is operated as the keys are moved t us giving a step-by-step movement to the ribbon without any liability of both spools being positively operated by the mechanism at the same time.

Another object of the invention is to provide simple and efficient ribbon reversing mechanism which may be folded with the platen into compact relation to another part of the machine when not in use.

Other objects of the invention are to provide simple and eflicient mechanism in which pawls are employed for rotating the ribbon spools, and to provide simple means which will throw one set of pawls out of engagement with one spool and place the other set of pawls in engagement with the other spool.

A further object of the invention is to provide a ribbon shift mechanism including a transversely arranged bar located adjacent to the platen and which bar ma be moved from opposite sides of the mac ine to cause the ribbon to move in either direction.

A still further object of the invention is to provide simple and efiicient means which may be operated in connection with a part of the escapement operating mechanism in order that at each depression of a key one of the spools may be operated so as to impart a step-by-step movement to the ribbon.

With these and other objects in view, the invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of *thisspecification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a longitudinal section, partly in elevation, of one form of typewriting machine embodying my invention. Fig. 2 is a detail plan view of the platen and ribbon operating mechanism. Fig. 3 is an enlarged fragmentary view of one end of the ribbon mechanism, showing the same in an inoperative position; an Fig. 4 is a fragmentary detail view of one end of theshift bar.

The machine frame 10 may have a plurality of transversely-extending rods 11 on which are ivotally mounted the key-levers 12, These ey-levers may be forced in one direction by the springs 13, and each keylever at its inner end may be connected by a link 14 to one of the type-bars 15. These type-bars are pivoted at one end to the brackets 16 and the other ends are provided with type-heads 17 having a lurali ty of characters thereon which are a apted to be forced against the platen 18. The platen 18 is mounted upon a carria e 19 which is adapted to travel back an forth along a bed 20, the latter being held to a suitable support 21, and said support is pivoted at 22 to arms 23 on opposite sides of the machine so that the platen carriage and parts mounted thereon may be moved into overhanging relation to the keyboard or typebars. The arms 23 are held to slides 24, one at each rear corner of the machine, and connected to the slides 24 is a suitable shift mechanism for elevatin the platen and carriage. The arts thus ar described may be of any suitable form and constructed in any desired-way.

The transversely-extending bar 26 is located between the slides 24 and may be connected to two upright arms or levers 27 which may be pivoted at their ends to a transversely-extending rod 28 so as to rock thereon, and said arms 27 have vertical slots, as 29, which are engaged by-the inturned ends 30 of bell-crank levers 31. There are two arms 27 and two bell-crank levers which are pivoted to a part of the frame adjacent to the arms 27 and have their outer ends, as 32, connected by upright portions 33 of a universal bar 34. This bar 34 is located over the key-levers and the space-bar levers in the usual manner, and as each lever is depressed, the universal bar will be raised and will cause the arms 27 on the rod 28 to rock back and forth, said arms together with the bar 26 serving as a frame and as a part of the feed mechanism.

A plate or device 35 is secured at or near each end of the transversely-extending and rocking bar 26, and this plate 35 may be adjustably held to said bar 26 by a slot and a screw 36, and the outer end of each of said plates 35 is upturned, as at 36, and is adapted to rock or move back and forth with the arms 27 and bar 26. At each side of the machine and secured to the arms 21 and to the upturned flange 38 of the carriage bed, is a plate 37, or this may be otherwise arranged and constructed from that shown. There are two plates 37 and each may form a part of the foldable support, an pivoted at 39 is a bell-crank lever 40. There are two bell-crank levers one at each side of the machine, and one arm, as the arm 41, is bent inwardly and downwardl and is adapted to be moved into the pat of the'upturned end 36 of one of the devices 35 in order that when the frame is rocked, the bell-crank lever will be also moved on its pivot, provided the arm 41 is in the ath of movement of said end 36. Each ellcrank lever has a rearwarclly-extending arm 42, and pivoted to this arm at 42 is a pawl 43. The pawl 43 has a part 44 adapted to engage the teeth of one of the ratchet wheels 45 and each wheel is rotatably held on a spindle 46, and movable with each ratchet wheel is a ribbon spool 47, said ribbon spools and ratchet wheels being loosely mounted to rotate on said spindles 46. A dog or detent 48 is pivoted at 49 to each plate 37, and this dog has a part 50 adapted to engage the teeth of the ratchet wheel 45 and prevent the rotation of the same except in one direction. The pawl 43 is normally forced into engagement with the ratchet wheel by means of a spring 51, one end of which engages the arm 42 and the other the pawl 43, while the pawl or dog 48 is normally forced into engaging position by a spring 52, one end of which is held to the plate 37, and the other end to the dog. The dog 48 has a substantially V-shaped recess in its outer end forming the engaging part 50 and a cam part 53, and this cam part is adapted to be engaged by the end 54 of the pawl 43 when the bell-crank lever is moved in one direction and to be disengaged therefrom when moved in the op osite direction, as will be presently dGSCIBVGd, there being a spring 55 one for each bell-crank lever, one end of which spring is fastened to a projectingl part 56 on the bell-crank lever, and its ot er end to an u wardly-projecting part or In 57 on each p ate 37 and tending to force t e arm 41 of the bell-crank lever in thepath of the end 36' of one of the devices 36.

To move the bell-crank levers in such a way as to release the pawls from one ratchet wheel and to permit the pawls of the other ratchet wheel to engage the 'same, various means may be employed. As shown, a bar, element or member 58 is provided, and this bar extends transversely of the machine along the flange 38 of the carriage bed and in front of the same, and at opposite ends thereof is rovided with a finger portion 59 b which t e said bar may be forced with a siding movement transversely of the machine from either side thereof. A slot 60 is provided at or near each end of the bar 58 and through this slot passes a screw 61 one end of which engages a projectin part 62 of the plate 37 and the flange 38 o the carria e bed, and the head of said screw at eac end of the machine serves as a guide for the bar and the body of said screw serves to limit the movement of said bar. The bar at its lower edge is provided with two cutaway parts or slots 63, Fig. 4, and adapted to enter each slot is the outer end of the arm 42 of the bell-crank lever or pawl-carrying element, said slots being somewhat larger or lug 57 and wi than the end of the arm 42. As will be seen when the bar is forced in one direction, as for example that shown in Fig. 2, the bellcrank levers will be forced so that the arm 41 on the ri ht will be in the path of the movement 0; the u turned end 36 of the plate or device 35, w ile the arm of the bellcrank lever on the left side will be carried outof the ath of movement of said device on that si e. During such movement, the end 54 of the pawl 43 will pass along and be guided by the u wardlyrojecting ortion 1 enter t e V-shape recess in the end of the holding dog or detent 48, and during this movement the said pawl 43 will be disengaged from the ratchet wheel 45 and-the action of the awl 43 on the dog 48 will also disengage t e same from the ratchet wheel so that the ribbon spool and the ratchet wheel .on that side of the machine may move freely on its spindle 46. At the same time that the pawls 43 and 48 are released fromone ratchet wheel, the same movement causes the two pawls on the other side of the machine to be forced by their springs into en agement with the ratchet wheel of the ribi on spool,.a'nd atthe same time causes the arm 41 of the bell-crank le-, ver at that side of the, machine to.be positioned in the path of movement of the upturned end '36 of the plate 35 of that side of the machine. It will,-therefore, be seen that as each key-lever is depressed, the rocking of .the arms.27 will cause a movement to be imparted to one of the bell-crank levers only an this will impart a step-by-step movement to the ribbon and as soon asthe ribbon has I n moved sufliciently to be wound from one spool on to the other, the bar 58 may be then moved or shifted in an opposite direction, and this will release the pawls from the ratchet of the full spool and cause the pawls on the op osite side to operate. the ribbon spool to wind the ribbon thereon. This 0 ration will continue until the bar is again orced in the opposite direction.

flat spring 64 is secured at one end of the flange 38 of the carriage bed, and this spring has its free end, as 65, adapted to engage the inner surface of the bar 58 in order to exert tension on the same and prevent the bar from shifting too easily. The bar 58 is rovided with a slot or roove adapted to e engaged by the end 0% the sprin when the bar is moved in one direction ten ing to hold it against accidental movement, and said end of the spring is ada ted to enter the openin or slot of the Ear when the latter is moved in the opposite direction. By this means, the bar must be iven a ositive movement before the paw s or ri bon mechanism can be disengaged from one sp'gol and placed into engagement with the ot er.

It will be understood that the word enmecha tire, as employed in certain of the claims and as applied to the immediate operating mechanism for each spool is intended to include those parts which directly cooperate with the ratchet wheel or other element, as the pawls and the means on which the actuating Paw] is mounted, or the equivalent thereo and when it is stated in certain of the claims that the mechanism of one of the spools is active or inactive, it is intended that the parts referred to or the equivalent thereof are in this condition. The construction shown is such that when either spool is being positively driven the actuating pawl of t e other spool and the part on which this awl is mounted are not moved at all and 0th pawls of each spool at this time are out of engagement with the ratchet wheel.

From the foregoing, it will be seen that simple and eflicient mechanism is provided whereby the direction of movement of the ribbon may be easily and quickly changed so as to cause the ribbon to'move with a stepbly-step movement first in one direction and ten in the opposite direction; that said mechanism may be applied to various kinds of machines whether of the folding type or other make; that said mechanism may be readil and cheaply made and assembled; and t at sim le means is provided for operating the ribbon spools and which may be also employed to operate the escapement nism.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a typewriting machine, the combination with key-le 'ers and type-bars operated by said key-levers, of a platen normally in the path of the type-bars and shiftable into compact relation to another part of the typewriter when not in use, a support shiftable with the platen, a plurality of ribbon spools independently rotatable on said support and foldable with the platen, independent mechanism located on opposite sides of the machine and adapted to independently rotate the ribbon spools, and means mounted on the support for simultaneously disengaging the mechanism from one of the spools and causing the mechanism of the other spool to engage the same to rotate said spool.

2. In a typewriting machine, the combination with key-levers and type-bars operated by said key-levers, of a carriage, a platen mounted on the carriage and normally in the path of the type-bars and shiftable with the carriage into compact relation to another part of the typewriter when not in use, a plurality of ribbon spools foldable with the platen, mechanisms locatedvon opposite sides of the machine and adapted to independently rotate the ribbon spools, and means shiftable with the carriage in its compact ion movement for simultaneously actuating a part of said mechanisms to cause one spool to be positively rotated and another spool to rotate freely independent of the operating mechanism.

3. In a typewriting machine, the combination with key-levers and type-bars operated by said key-levers, of a carriage, a platen mounted on the carriage and normally in the path of the type-bars and shiftable into overhanging relation to the keyboard of the typewriter when not in use, a support, two ribbon spools independently rotatable on said support and foldable with the platen and carriage, independent mechanisms located on opposite sides of the machine and adapted to rotate the ribbon spools, and'a movable bar for simultaneously actuating said mechanisms to cause one spool to be positively rotated and the other spool to rotate freely on its support.

4. In a typewriting machine, the combination of a support, a plurality of spools adapted to rotate on said support, independent means including a horizontally arranged bell crank lever for rotating each spool, and a slidably held bar movable transversely of the machine and having slots near its ends adapted to fit over one arm of each bell-crank lever of the spool-operating means to throw one means out of engagement with one spool and to throw the other means into engagement with the other spool.

5. In a typewriting machine, the combination of a support, two spindles located on opposite sides of the machine and held to the support, spools rotatably mounted on the spindles, a ratchet wheel carried by each spool, a bell-crank lever pivotally held adjacent to said ratchet wheel, a pawl mounted on said lever and adapted to engage the ratchet wheel, a holding dog, key-levers, a; rocking bar operati 'ely connected to be moved by the key-levers, means carried by the bar adapted to operate the bell-crank levers, and means for operating the bellcrank levers whereby one of said levers is moved into the path of said rocking bar and the other lever moved out of the path thereof to cause one spool to be positively rotated and allow the other spool to move freely on its spindle.

6. In a typewriting machine, the combination of a support, a plurality of rotatable spools mounted on said support, two independent ratchet wheels for operating the spools, a bell-crank lever pivotally held adjacent to each ratchet wheel, means moved by said lever and adapted to rotate the ratchet wheel, key-levers, a rocking bar operatively connected to be moved by the keylcvers, projecting means carried by the bar adapted to operate the bell-crank levers, and a slidingly held and transversely movable device for shifting the bell-crank levers for the purpose set forth.

7. In a typewriting machine, the combination of a support, a plurality of spools mounted on the support, a ratchet wheel carried by each spool, a horizontally movable bell-crank lever pivotally held adjacent to said ratchet wheel away from the axis of the spool, a pawl mounted on said lever and adapted to engage the ratchet wheel, a holding dog, key-levers, a rocking bar operatively connected to be moved by the keylevers, and means carried by the bar adapted to independently operate the bell-crank levers.

8. In a typewriting machine, the combination of a support, a plurality of spools rotatably mounted onthe support on opposite sides of the machine, ratchet wheels for operating the spools, key-levers, a rocking frame comprising vertically arranged arms and a transversely extending bar and operativefil connected to be moved by the keylevers, and independent means movable by the frame adapted to rotate the ratchet wheels, only one of said 'means being actuated at a time.

9. In 'a typewriting machine, the combination of a support, two spools held to said support on opposite sides of the machine, key-levers, a rocking bar operatively connected to the key-levers to be moved by the same, devices projecting outwardly from the rocking bar, independent mechanisms operated by said devices and adapted to rotate the spools independently of each other, said mechanisms being operated one at a time only, and means for disengaging one mechanism from one spool and causing the other mechanism to engage with the other spool.

10. In a typewriting machine the combination of a support, two spools held to said support on opposite sides of the machine, key-levers, a rocking frame comprising upwardly-extending arms and a bar connecting said arms, said arms beingoperativel connected to the key-levers to be moved y the same, ad'ustably held devices pro'ecting outwardly rom the frame, indepen ent mechanisms operated by said devices one at a time and adapted to rotate the spools inde endently of each other, and a transverseiy-extending and slidable element for disengaging one mechanism from one spool and causing the other mechanism to engage with and operate the other spool.

11. In a typewriting machine, the combination of a 'sup ort, two ribbon spools rotatably held on t e su port on opposite sides of the machine, keyevers, devices located on o posite sides of the machine and moveu by t e key-levers, and independent movable arms carrying pawls and operated by said devices one at a time and adapted to rotate the spools independently of each other.

12. In a typewriting machine the combination of a support, two spools held to said support on opposite sides of the machine, key-levers, devices located on opposite sides of the machine, horizontally movable bellcrank levers operated by said devices and having means adapted to rotate the s ls independently of each other, only one o a said levers bein operated at a time, and a sliding bar em racin the bell-crank levers for disengaging one ll-crank lever from one spool and causing the other bell-crank lever to rotate the other spool.

13. In a typewriting machine, the combination of a support, two spools mounted on the support at opposite sides of the machine, a rate et wheel movable with each spool, a bell-crank lever for each ratchet wheel having an inwardly and downwardly projecting arm, key-levers, a rocking bar operatively connected to be moved b each key-lever, devices carried by the rocking bar adapted to engage one only of the bell-crank levers at a time, a pawl carried by each bellcrank lever, a holding dog adapted to engage each ratchet wheel and adapted to be disengaged therefrom b the pawl of 'the bellcrank lever, and a sliding bar movable transversely of the machine and having finger portions, said bar engaging a part of each bell-crank lever and movin the same there-- with, and a spring norma 1y forcing each bell-crank lever in one direction.

14. In a typewriting machine, the combination of a sup ort, ribbon supporting means mounted on t e su port, a ratchet wheel, a horizontal! movab e bell-crank lever having an inward y projecting arm, key-levers, a rocking frame operatively connected to be moved by each key-lever, devices carried by the frame adapted to engage the bellcrank levers to operate one only at a time, a pawl carried by each bell-crank lever, and a holding dog for each ratchet wheel.

15. In a typewriting machine, the combination of a support, two s )ools mounted on the support at o posite si es of the machine, a ratchet whee carried by each spool, a bellcrank lever having an inwardly-projecting arm, key-levers, a rocking frame operatively connected to be moved h each key-lever, devices carried by the reciting frame adapted to engage one of the bell-crank levers at a time, a spring-actuated pawl carried by each bell-crank lever, a spring-actuated holding dog adapted to engage each. ratchet wheel and ada ted to be disengaged therefrom b the aw of the bell-crank lever, and a sli ing ar movable transversely of the machine and having finger portions at the ends of said bar said bar loosely engaging a part of each bel -crank lever and moving the same therewith, and a spring normally forcing each bell-crank lever in one direction.

16. In a typewriting machine, the combination of a support two spools mounted on opposite sides of t e mac ine, a plate for each spool forming a part of the support and havin a projection extending u wardl there om, a ratchet wheel movab e wit each spool and rotatabl held to the plate, a bell-crank lever pivota ly held to the plate and havinfi one arm extending inwardly and downwar y and the other arm rearwardly, a spring-pressed pawl carried by the rear arm of each lever and having an engaging end adapted to engage the projection and be guided thereby, a spring normally forcing the bell-crank lever in one direction, a spring-pressed holding dog having a V- s aped recess adapted to be engaged by the pawl to release said dog fromengagement with the ratchet wheel when moved in one direction, a bar having a finger portion at each end and held to slide transversel of the machine and havin slots enga 'nglt e rearward arm of each ll-crank ever to move the same therewith to cause one set of awls to engage the ratchet wheel of one 00 and to disengage the other pawls om the ratchet wheel of the other spool, and a tension 8 ring engaging the bar and tending norma ly to ho d it against accidental movement.

17. In a typewriting machine, the combination of a support, two spools mounted on opposite sides of the machine, a projection extending upwardly from the support on opposite sides of the machine, a ratchet wheel movable with each spool and rotatably held on the support, a bell-crank lever pivotally held to the su port and having one arm extending inward y and the other arm rearwardly, a spring-pressed awl carlz;ied by the rearward arim 8f 88.051 ever and aving an engagin en a apte to enga the projection an be guided thereby, spring normally forcing the bell-crank lever in one direction, a spring-pressed holding dog having a V-shaped adapted to be engaged by the pawl to release the same from engagement with the ratchet wheel when moved in one direction, and a bar havin a finger portion at each end and held to side transversely of the machine and' having slots engaging the rearward arm of each bell-crank lever to move the same therewith to cause one set of pawls to engage the ratchet wheel of one s to disengage the other pawls ratchet wheel of the other spool.

18. In a typewriting machine, the combination of a support, two spools mounted on opposite sides of the machine, a ratchet wheel movable with each spool and rotatably held on the support, a bell-crank lemm the l, and

ver pivotally held to the plate and having one arm extending inwardly and the other arm rearwardly, a spring-pressed pawl carried by the rearward arm of each lever and having an engaging end, a spring normally forcing the bell-crank lever in one direction, a spring-pressed holding dog adapted to be engaged by the pawl to release the same from engagement with the ratchet wheel when moved in one direction, and a bar having a finger portion at each end and held to slide transversely of the machine and having slots engaging the rearward arm of each bell-crank lever to move the same therewith to cause one set of pawls to engage the ratchet wheel of one spool, and to disengage the other pawls from the ratchet wheel of the other spool.

19. In a typewriting machine, the combination of a support, two spindles located on opposite sides of the machine and held to the support, spools rotatably mounted on the spindles, a ratchet wheel carried by each spool, a bell-crank lever pivotally held adjacent to said ratchet wheel, a pawl mounted on said lever and adapted to engage the ratchet wheel, a holding dog, key-operated levers, a rocking bar operatively connected to be moved by the key-operated levers,

means carried by the bar adapted to operate the bell-crank levers, and means for operating the bell-crank levers whereby one of said levers is movedinto the path of said rocking bar and the other moved out of the path thereof to cause one spool to be positively rotated and the other caused to move freely on its spindle, said dogs being automatically disengaged from the ratchet wheels by engagement with the pawls during their disengaging movement.

20. In a typewriting machine, the combination of a support, two spools mounted on the support at opposite sides of the machine, a ratchet wheel movable with each spool, a bell-crank lever for each ratchet wheel having an inwardly and downwardly projecting arm, key-levers, a rocking bar operatively connected to be moved by each keylever, devices carried by the rocking bar adapted to engage one only of the bellcrank levers at a time, a pawl carried by each bell-crank lever, a holdin dog adapten to engage each ratchet whee and adapted to be disengaged therefrom by the pawl of the bell-crank lever, and manually operated means for operating the bell-crank levers to move the pawls to an engaged or disengaged position.

21. In a typewriting machine, the combination of a support, two spools mounted on opposite sides of the machine on said support, a ratchet wheel carried by each spool.v a bell-crank lever for each spool, a pawl mounted on each bell-crank lever adapted to engage its cooperating ratchet wheel, a holding dog for each ratchet wheel adapted to be engaged by the pawl located adjacent thereto when the bell-crank is moved in one direction to disengage the pawl from the ratchet wheel, and means for operating the bell-crank levers one at a time.

22. In a typewriting machine, the combination of a support, two spools mounted on opposite sides of the machine on said su port, ratchet wheels carried by the spoo s, a lever for each spool, means for operating the levers, pawls mounted on said levers adapted to engage the ratchet wheels, and normally fixed holding dogs adapted to be engaged by the pawls and automatically disengaged from the ratchet wheels when the pawls are moved to a disengaged position.

23. In a typewriting machine, the combination of a support, a rocking frame, two ribbon spools, mechanisms for independently rotating the spools, and means for throwing one entire mechanism into operative relation with the rocking frame and the other entire mechanism out of operative relation thereto.

24. In a typewriting machine, the C0ml)l nation of a support, a rocking frame, two ribbon spools, mechanisms for independently rotating the spools, a bar for throwing one entire mechanism into operative relation with the rocking frame and the other mechanism out of operative relation thereto.

'25. In a typewriting machine, the com bination of a support, a movable frame, two ribbon spools, mechanisms for independently rotating the spools, and a manually operated and transversely-extending bar for throwing one entire mechanism into operative relation with said frame and the other entire mechanism entirely out of operative relation thereto.

26. In a typewriting machine, the combination of a support, a rocking frame having outwardly extending portions, two ribbon spools mounted upon said support, holding dogs, a bell-crank lever for each spool, a pawl mounted on each lever adapted to rotate one of said spools, and a bar slidingly held on the support and ada ted to move one bell-crank into the path 0 movement of the projecting portion of the rocking frame and the other out of operative relation thereto.

27. In a typewritiing machine, the com- .bination of a support, a movable frame having outwardly extending portions, two ribbon spools mounted upon said support, holding dogs, a bell-crank lever for each spool carrying a. pawl adapted to rotate said spools, and means slidingly held on the suport and adapted to move one bell-crank into the path of movement of said portion of the frame and the other out of operative relation thereto.

28. In a typewriting machine, the combination of a support, a platen carriage arranged on said support and shiftable into compact relation to another part of the machine when not in use to make the same occupy less space than when in a normal working position, ribbon mechanism including pawl-carrying bell-crank levers located on opposite sides of the machine, a rocking frame having projecting portions independent of the bell-crank levers and separable from the bell-crank levers, said levers and ribbon mechanism being shiftable with the carriage in its com act movement, means for throwing one be -crank lever into operative relation and the other out of operative relation with the rocking frame, and means for operating the rocking frame.

29. In a typewriting machine, the combination of a support, a platen carriage arranged on said support and shiftable into compact relation to another part of the machine when not in use to makethe same occupy less space than when in a normal working position, ribbon mechanism including pawl-carrying bell-crank levers-located on opposite sides of the machine, key-operated levers, and mechanism operated by said kefioperated levers and separable from the be crank levers, said levers and ribbon mechanism being shiftable with the carriage in its compact movement.

30. In a typewriting machine, the combination of a support, two ribbon spools mounted thereon, lndetgendent means for independently rotating e ribbon spools, keyoperated levers, and means for throwing one only of the entire spool-operating means into operative relation to the key-operated levers.

31. In a typewriting machine, the combination of a support, key-operated levers, ribbon spools mounted on said support, mechanisms for independently rotating the ribbon spools only one of the entire mechanisms being in operative relation with said levers at the same time.

32. In a typewriting machine, the combination of a support, two ribbon spools located at a distance apart, mechanism for each of the spools adapted to independently rotate the same, means for throwing one mechanism into position to operate one spool and the other out of operative position, key-operated levers, and means whereby one ribbon mechanism may remain entirely inactive of any movement by said levers.

33. In a typewriting machine, the combination of a support, two ribbon spools located at a distance apart, a mechanism "for each of the spools adapted to independently rotate the same, a bar for throwing one mechanism into position to operate one spool and the other out of operative position, key-operated levers, and means whereby one entire mechanism may be thrown into operative relation to the key-operated levers and the other entirely out of operative relation thereto.

34. In a 'typewriting machine, the combination of a support, ribbon spools located at a distance apart, mechanism for each of the spools adapted to independently rotate the same, a bar for throwing one mechanism into position to operate one spool and the other out of operative position, key-operated levers, and means separable from the ribbon mechanisms whereby one entire mechanism may be thrown into operative relation with the key-operated levers and the other entire mechanism out of operative relation thereto.

This s cification signed and witnessed this 22d dfy of October A. D. 1910.

OTTO PETERMANN.

\Vitnesses:

I. M. MANYHAig, W. G. Rnonns. 

